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A096484 Integer part of the square root of [2n-1]-th decimal repunit. 1
1, 10, 105, 1054, 10540, 105409, 1054092, 10540925, 105409255, 1054092553, 10540925533, 105409255338, 1054092553389, 10540925533894, 105409255338945, 1054092553389459, 10540925533894597, 105409255338945977 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..18.

FORMULA

a[n]=Floor[sqrt[(-1+10^[2n-1])/9]]]=Floor[sqrt[A002275(2n-1)]]

EXAMPLE

a[149] = 105409255338945992621035871466885843195271266221118708483580260692369866752

CROSSREFS

Cf. A002275.

Sequence in context: A260214 A077369 A068618 * A190955 A004343 A163166

Adjacent sequences:  A096481 A096482 A096483 * A096485 A096486 A096487

KEYWORD

base,nonn

AUTHOR

Labos Elemer, Jun 24 2004

STATUS

approved

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Last modified September 22 05:47 EDT 2019. Contains 327287 sequences. (Running on oeis4.)